Evaluate.
A. 7
B. 280
C. 56
D. 35
Answer: C
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Find the vertex, focus, and directrix of the parabola. Graph the parabola.x2 - 10x - 12y + 85 = 0
A. vertex: (5, 5); focus: (2, 5);
directrix: x = 8
B. vertex: (5, 5); focus: (8, 5);
directrix: x = 2
C. vertex: (5, 5); focus: (5, 2);
directrix: y = 8
D. vertex: (5, 5); focus: (5, 8);
directrix: y = 2
Find all of the real zeros of the function. Give exact values whenever possible. Identify each zero as rational or irrational.f(x) = x3 + 4x2 - 3x - 12
A. 4 (rational), 
(irrational), and -
(irrational)
B. -4 (rational), 3 (rational), and -3 (rational)
C. -4 (rational), 2
(irrational), and -2
(irrational)
D. -4 (rational), 
(irrational), and -
(irrational)
Solve the triangle. For angles given in degrees and minutes, round to the nearest minute. Round all other angles to the nearest tenth of a degree when necessary. Round side lengths to the nearest hundredth when necessary.B = 40.1°b = 24.1 in.c = 19.4 in.
A. No solution B. A = 31.2°, C = 108.7°, a = 35.44 in. C. A = 108.7°, C = 31.2°, a = 35.44 in. D. A = 98.7°, C = 41.2°, a = 35.44 in.
Solve the problem.Anne and Nancy use a metal alloy that is 13% copper to make jewelry. How many ounces of an alloy that is 11% copper must be mixed with an alloy that is 16% copper to form 55 ounces of the desired alloy?
A. 22 ounces B. 33 ounces C. 27 ounces D. 35 ounces